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Transverse muon polarization in K+ -> mu+ nu_mu gamma: scanning over the Dalitz plot

F. L. Bezrukov·D. S. Gorbunov·Yu. G. Kudenko
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Abstract

We study the potential of the measurement of the transverse muon polarization P_T in the K->mu nu gamma decay with the sensitivity of δP_T ~ 10^{-4}. It is shown that the forthcoming experiment can measure the contribution of the electromagnetic final state interactions to P_T that gives a possibility to unambiguously determine the signs of the sum of the kaon form factors F_V and F_A even without fixing their difference. We also estimate the sensitivity of this experiment to the new physics, which could give rise to T-violation: multi-Higgs doublet models, supersymmetric extensions of the Standard Model, left-right symmetric model and leptoquark models.

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F. L. Bezrukov, D. S. Gorbunov, Yu. G. Kudenko. 2003-04-15. Transverse muon polarization in K+ -> mu+ nu_mu gamma: scanning over the Dalitz plot. https://doi.org/10.1140/epjc%2Fs2003-01297-x

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